Noizio - Feeling that the noise of the big city is too much for you to bear?
zenmix.io - Ambient background sound generator
Power Nap App - Best napping timer with relaxing sleep sounds
Defonic - Create a unique sound environment at home or in the office
Sleepy Baby - Help your baby sleep with the Sleepy Baby soundboard.
SoundDrown - Ambient sounds to help you focus, relax, and escape